friendica/src/Module/RemoteFollow.php

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<?php
/**
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* @copyright Copyright (C) 2010-2021, the Friendica project
*
* @license GNU AGPL version 3 or any later version
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*
*/
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namespace Friendica\Module;
use Friendica\BaseModule;
use Friendica\DI;
use Friendica\Core\Logger;
use Friendica\Core\Protocol;
use Friendica\Core\Renderer;
use Friendica\Core\Search;
use Friendica\Core\System;
use Friendica\Model\Contact;
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use Friendica\Model\Profile;
use Friendica\Network\Probe;
/**
* Remotely follow the account on this system by the provided account
*/
class RemoteFollow extends BaseModule
{
public static function init(array $parameters = [])
{
Profile::load(DI::app(), $parameters['profile']);
}
public static function post(array $parameters = [])
{
$a = DI::app();
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if (!empty($_POST['cancel']) || empty($_POST['dfrn_url'])) {
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DI::baseUrl()->redirect();
}
if (empty($a->profile['uid'])) {
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notice(DI::l10n()->t('Profile unavailable.'));
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return;
}
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$url = Probe::cleanURI($_POST['dfrn_url']);
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if (!strlen($url)) {
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notice(DI::l10n()->t("Invalid locator"));
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return;
}
// Detect the network, make sure the provided URL is valid
$data = Contact::getByURL($url);
if (!$data) {
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notice(DI::l10n()->t("The provided profile link doesn't seem to be valid"));
return;
}
if (empty($data['subscribe'])) {
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notice(DI::l10n()->t("Remote subscription can't be done for your network. Please subscribe directly on your system."));
return;
}
Logger::notice('Remote request', ['url' => $url, 'follow' => $a->profile['url'], 'remote' => $data['subscribe']]);
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// Substitute our user's feed URL into $data['subscribe']
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// Send the subscriber home to subscribe
// Diaspora needs the uri in the format user@domain.tld
if ($data['network'] == Protocol::DIASPORA) {
$uri = urlencode($a->profile['addr']);
} else {
$uri = urlencode($a->profile['url']);
}
$follow_link = str_replace('{uri}', $uri, $data['subscribe']);
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System::externalRedirect($follow_link);
}
public static function content(array $parameters = [])
{
$a = DI::app();
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if (empty($a->profile)) {
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return '';
}
$target_addr = $a->profile['addr'];
$target_url = $a->profile['url'];
$tpl = Renderer::getMarkupTemplate('auto_request.tpl');
$o = Renderer::replaceMacros($tpl, [
'$header' => DI::l10n()->t('Friend/Connection Request'),
'$page_desc' => DI::l10n()->t('Enter your Webfinger address (user@domain.tld) or profile URL here. If this isn\'t supported by your system, you have to subscribe to <strong>%s</strong> or <strong>%s</strong> directly on your system.', $target_addr, $target_url),
'$invite_desc' => DI::l10n()->t('If you are not yet a member of the free social web, <a href="%s">follow this link to find a public Friendica node and join us today</a>.', Search::getGlobalDirectory() . '/servers'),
'$your_address' => DI::l10n()->t('Your Webfinger address or profile URL:'),
'$pls_answer' => DI::l10n()->t('Please answer the following:'),
'$submit' => DI::l10n()->t('Submit Request'),
'$cancel' => DI::l10n()->t('Cancel'),
'$request' => 'remote_follow/' . $parameters['profile'],
'$name' => $a->profile['name'],
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'$myaddr' => Profile::getMyURL(),
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]);
return $o;
}
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}